The appearance color of the fire water supply epoxy resin coated composite steel pipe is red, and seamless steel pipe is selected as the working steel pipe. The inner and outer surfaces of the steel pipe are processed by epoxy resin powder hot melt bonding technology. The selection of materials for epoxy resin coated composite steel pipes for fire water supply is very important. The working steel pipes need to undergo a comprehensive re inspection upon arrival at the factory, including the geometric dimensions, chemical composition, and mechanical properties of the steel pipes.